Stayed here 3 nights in Jan 2012 while travelling with a group of friends.
Avoid this hostel. All the other guests that were staying here were as disappointed as us. The problem is that if you want to book a hotel in Capurgana from abroad, this is one of the few that you actually can manage to book. Once there, we discovered that the agency that booked it for us had charged a 100% mark up on the price of the rooms. The other hostels of same quality in Capurgana cost a third of this one.
This hotel looks nice in the photos but in reality it is falling into pieces.
Terrible location. It is in front of the sea but the beach is disgusting so you have to walk 20 mins back to the town centre and then either go to the beach next to the port (not great) or take a boat and go to one of the other mediocre playas of the area.
The Sol Y Luna has no hot water and electricity works randomly so you definitely need to bring a lamp with you as you will need it to reach your room and walk back home at night or just to go to the bathroom.
The rooms are old, dirty and full of beds (we had a room with 5 beds + 1 double).
The guy who looks after the hotel is actually nice and helpful. He cooks breakfast in the morning and dinner in the evening, both served in the terrace on the top floor, which is not too bad.
This hotel is heavily overpriced, avoid it. I would avoid Capurgana in general to be honest, don't be fooled by the description in the Lonely Planet. Even if you go to La Miel in Panama (small, crowded but white sand beach), you will not enjoy the sea as it is very dirty.